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| -rw-r--r-- | Documentation/devicetree/bindings/misc/qcom,fastrpc.txt | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt new file mode 100644 index 000000000000..06e8c25839d5 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt @@ -0,0 +1,73 @@ +Qualcomm Technologies, Inc. FastRPC Driver + +The FastRPC driver implements an IPC (Inter-Processor Communication) +mechanism that allows for clients to transparently make remote method +invocations across DSP and APPS boundaries. This enables developers +to offload tasks to the DSP and free up the application processor for +other tasks. + +- compatible: + Usage: required + Value type: <stringlist> + Definition: must be "qcom,fastrpc" + +- reg + Usage: required + Value type: <u32> + Definition: DSP Processor ID. + Possible values are : + 0 - ADSP + 1 - MDSP + 2 - SDSP + 3 - CDSP + += COMPUTE BANKS +Each subnode of the Fastrpc node represents compute context banks available +on the dsp. The name of the nodes are not important. The properties of these +nodes are defined by the individual bindings for the specific service +- All Compute context banks MUST contain the following property: + +- compatible: + Usage: required + Value type: <stringlist> + Definition: must be "qcom,fastrpc-compute-cb" + +- reg + Usage: required + Value type: <u32> + Definition: Context Bank ID. + +- secured: + Usage: Optional + Value type: <boolean> + Defination: Indicating context bank is secured + +- nsessions: + Usage: Optional + Value type: <u32> + Defination: A value indicating how many sessions can share this + context bank. Defaults to 'One' when this property + is not specified. + +Example: + +fastrpc { + compatible = "qcom,fastrpc"; + qcom,smd-channels = "fastrpcsmd-apps-dsp"; + reg = <0>; /* DOMAIN_ADSP */ + #address-cells = <1>; + #size-cells = <0>; + + cb@1 { + compatible = "qcom,fastrpc-compute-cb"; + reg = <1>; + iommus = <&lpass_q6_smmu 1>; + }; + + cb@2 { + compatible = "qcom,fastrpc-compute-cb"; + reg = <2>; + iommus = <&lpass_q6_smmu 2>; + }; + ... +}; |